Which level switch will work for your application?
You can find many types of point level detectors on the market using all kinds of measuring techniques. But not all of them can detect the level in every application.
One needs to consider factors like build-up or foam, texture for granular or powdery products, the environment, the installation needs, and more.So let’s see which level switch might work for you!
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Where to use point level switches
Where can you use a point level switch? Or maybe we should ask where can’t you use one? From food to energy to chemicals and beyond, all sorts of industries use level switches to protect tanks and vessels. A level switch can also detect the presence or absence of product in pipelines. You can read more in our article on point level detectors and their types.
But which type will give you reliable data? Does it matter whether your product is oil or cement? Let’s dig in further.
Liquid or solid product?
The first step for selecting a level switch is easy: liquid or solid? But keep in mind you have other steps to consider.
For most liquid products, you can use a vibrating, capacitive, or conductive switch. But you need more parameters, like liquid type, density, viscosity, and conductivity.
Water, a fluid with a conductivity greater than 50,000 micro-Siemens per centimeter, can use any of the three switches mentioned above.
For oil, the vibrating switch becomes your first choice, because oil blocks more vibrations. However, you can use a conductive switch here too.
Honey, a very viscous fluid, tends to build up on probes, so capacitive and conductive switches work best in it. These switches have self-cleaning features, so they do well in other products that build up.
Examples of options:
- Endress+Hauser: Liquiphant FTL33, Liquipoint FTW 23, and FTW 33
- Krohne: OPTISWITCH 4000 and OPTISWITCH 6600
- Vega: VEGAMIP T/R61, VEGASWING 51, 61, And 63
For bulk solids, granular materials, or powdery products, then you have choices like vibronic, capacitive, and paddle switches.
Cement, wheat flour, chalk powder are the powder textured solid with Density less than 3 g/cm3. And we can use vibronic, capacitive, or paddle switch as mentioned above.
Examples of options:
- Endress+Hauser: Soliphant FTM 21, Minicap FTC262 and Soliswitch FTE 30
- Krohne: OPTISWITCH 3100, OPTISWITCH 6600
- Vega: VEGAVIB 61, VEGAWAVE 61 and VEGACAP 62
Vibration switches work well in many applications because they don’t depend on physical changes. And capacitive switches work great with smaller tanks, processes with heavy build-up, high-temperature products, and for sanitary and CIP requirements. Depending on what your process needs, you can find a suitable switch with no compromise.
If you want to know more about these devices, then check out our device directory, where you’ll find examples of each to compare.VEGAMIP